GB348941A - Improvements in thermionic generators - Google Patents
Improvements in thermionic generatorsInfo
- Publication number
- GB348941A GB348941A GB20225/30A GB2022530A GB348941A GB 348941 A GB348941 A GB 348941A GB 20225/30 A GB20225/30 A GB 20225/30A GB 2022530 A GB2022530 A GB 2022530A GB 348941 A GB348941 A GB 348941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- valve
- circuit
- series
- tuned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
348,941. Valve generating circuits. TELEPONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. July 3, 1930, No. 20225. Convention date, July 5, 1929. [Class 40 (v).] To maintain a substantially constant output over a wide frequency range in a valve-generator, the anode circuit of a valve D2 comprises a series-tuned circuit L, C, tuned to the working frequency, and in series with a resistance R4 having the same ohmic resistance as the loss resistance of the circuit L, C at resonance. The impedance of the output circuit is independent of frequency, and a constant degree of back-coupling is applied from a point a on the resistance R4 to a preceding valve through a metallic connection involving no phasechange, so as to maintain the two valves in oscillation. High-tension voltage is fed to the plate of valve D2 through a resistance R3. A second parallel resistance R5 is tapped at b to the input of an amplifier F. A third branch circuit C2, R6 compensates any phase-displacement due to the condenser C. The effective value of the resistances R3, R4, R5 is equivalent to the loss resistance at resonance of the tuned circuit L, C. The series tuning allows the use of a smaller and less expensive condenser combined with a higher inductance than usual.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE348941X | 1929-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB348941A true GB348941A (en) | 1931-05-21 |
Family
ID=20308575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20225/30A Expired GB348941A (en) | 1929-07-05 | 1930-07-03 | Improvements in thermionic generators |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR698344A (en) |
| GB (1) | GB348941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE755254C (en) * | 1935-02-25 | 1952-06-26 | Marconi Wireless Telegraph Co | Multivibrator circuit |
-
1930
- 1930-07-03 FR FR698344D patent/FR698344A/en not_active Expired
- 1930-07-03 GB GB20225/30A patent/GB348941A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE755254C (en) * | 1935-02-25 | 1952-06-26 | Marconi Wireless Telegraph Co | Multivibrator circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| FR698344A (en) | 1931-01-29 |
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